Dynamic evolution of reservoir permeability and deformation in geothermal battery energy storage using abandoned mines
January 2025
Retasking existing subsurface abandoned mines as infrastructure for solar energy storage could be a feasible approach in overcoming the low thermal gradient present in shallow formations. In this work,...
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Manually directional splitting of in-situ intact igneous rocks into large sheets
January 2025
This paper presents a directional large-area rock fracturing method. The method had distinctive features compared with other common fracturing methods. The area of the fracturing surface could reach...
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Analysis of tunnel lining internal forces under the influence of S and P-waves: An analytical solution and quasi-static numerical method
Available online 26 November 2024
This paper employs analytical and pseudo-static approaches to analyze the tunnel response under the compression (P) and shear (S) waves. In the first step, Einstein and Schwartz’s method is revised...
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Numerical modeling of the long-term poromechanical performance of a deep enhanced geothermal system in northern Québec
Available online 24 November 2024
This study numerically investigates the thermo-poromechanical effects in a Canadian geothermal reservoir caused by long-term fluid production and injection. Using finite element modeling, it explores...
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Three-Dimensional Numerical Study of DTH Bit–Rock Interaction with HPWJ Downhole Slotting: Influence of Bit Design and Bottom Hole Geometric Conditions on Rock Breaking Efficiency in Percussive Drilling
Available online 23 November 2024
The EU H2020 ORCHYD project seeks to enhance drilling efficiency in hard rock environments, particularly for deep geothermal wells, by integrating innovative rock weakening techniques. In this context,...
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Study on damage characteristics of iron ore under variable line density charge structure blasting
October 2024
Blasting test research was conducted on iron ore specimens with variable line density charging structures. Computer tomography (CT), digital image processing, and three-dimensional model reconstruction...
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Continuous-discontinuous analysis of bench blasting in open-pit mining: Influences of hole packing and caving holes
October 2024
Bench blasting is commonly used in open-pit mining. Some design parameters such as positions of hole packing and caving holes have great influences on the blasting effects. In this work, with a hybrid...
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Application of artificial intelligence in three aspects of landslide risk assessment: A comprehensive review
October 2024
Landslides are one of the geological disasters with wide distribution, high impact and serious damage around the world. Landslide risk assessment can help us know the risk of landslides occurring, which...
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Experimental study on failure mechanism of soft rock-coal bodies in abandoned mines under cyclic dynamic loading
October 2024
During the construction and operation of a pumped storage power station in an abandoned mine, the soft rock-coal body structure, comprising the roof and the residual coal pillars, encounters a complex...
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A coarse-grained bonded particle model for large-scale rock simulation
October 2024
For solving the computationally intensive problem encountered by the discrete element method (DEM) in simulating large-scale engineering problems, it is essential to establish a numerical model that...
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Experimental behavior and fracture prediction of a novel high-strength and high-toughness steel subjected to tension and shear loading tests
October 2024
In this study, laboratory testing and numerical simulation methods are used to investigate the mechanical behavior and perform fracture prediction of a novel high-strength and high-toughness steel with...
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Discontinuous deformation analysis for subsidence of fractured formations under seepage: A case study
October 2024
With the growing prominence of recycling projects of groundwater, the attention towards subsidence concerns in geological formations is intensifying. However, due to the long evolutionary time and complex...
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Effects of joint persistence and testing conditions on cyclic shear behavior of en-echelon joints under CNS conditions
October 2024
Cyclic shear tests on rock joints serve as a practical strategy for understanding the shear behavior of jointed rock masses under seismic conditions. We explored the cyclic shear behavior of en-echelon...
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Viscoelastic plastic interaction of tunnel support and strain-softening rock mass considering longitudinal effect
October 2024
A simplified two-stage method was employed to provide an explicit solution for the time-dependent tunnel-rock interaction, considering the generalized Zhang-Zhu strength criterion. Additionally, a simplified...
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Shear behavior and dilatancy of an artificial hard-matrix bimrock: An experimental study focusing on the role of blocky structure
October 2024
Bimrocks are characterized by their geotechnically significant blocky structure, presenting complex shear behavior. This study investigates the shear behavior and dilatancy of bimrocks featuring a rock-like...
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Data-driven machine learning approaches for simultaneous prediction of peak particle velocity and frequency induced by rock blasting in mining
Available online 11 October 2024
The vibrations generated by rock blasting are a serious and hazardous outcome of these activities, causing harmful effects on the surrounding environment as well as the nearby residents. Both the local...
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Enhancing production rates at El Teniente’s black cave mine through optimizing HF hole distribution with spatio-statistical methods
Available online 26 September 2024
This study at the Esmeralda Mine, part of the El Teniente Division of CODELCO, investigates optimizing hydraulic fracturing (HF) holes’ spatial distribution to improve rock material production in one...
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Finite domain solution of a hydraulic fracture in a permeable rock
Available online 16 September 2024
In this work, we present a domain-based algorithm to simulate the propagation of a plane-strain hydraulic fracture in a zero-toughness permeable elastic medium. The algorithm utilizes a domain-based...
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The effects of staggered and non-staggered joints on the ultimate bearing capacity, load settlement behavior, and failure mechanism with the change of excavation depths
Available online 5 September 2024
Extensive research is available on excavation walls in soils. However, very few studies address their performance in rocks and jointed rock masses. This study aimed to investigate the effect of staggered...
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Modeling of particle migration in piping based on an improved discrete element method
Available online 1 September 2024
Pore-scale particle migration in piping is the main reason of the suffusion-induced damage, which poses a significant threat to earth-rock dams. In order to investigate the micro-mechanism of piping...
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Exploring Machine Learning Techniques for Open Stope Stability Prediction: A Comparative Study and Feature Importance Analysis
Available online 31 August 2024
The stability of underground excavations is essential for ensuring the safety of mining operations. Classical stability assessment methods, established in empirical formulas and rock mass classification...
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Simultaneously improving ROP and maintaining wellbore stability in shale gas well: A case study of Luzhou shale gas reservoirs
July 2024
The ROP (rate of penetration) within the horizontal section of shale gas wells in the Luzhou oil field is low, seriously delaying the exploration and development process. It is proved that reducing...
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Two-phase flow thermo-hydro-mechanical modeling for a water flooding field case
July 2024
Simulation of subsurface energy system involves multi-physical processes such as thermal, hydraulical, and mechanical (THM) processes, and requires a so-called THM coupled modeling approach. THM coupled...
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Characterization and modeling of supercritical CO2 pulse pressures: Effects of activator mass and discharge plate thickness
July 2024
Utilizing a bespoke CO2 phase transition pulse pressure experimental system, we conducted pulse pressure characterization tests across various activator masses, CO2 filling pressures, and energy discharge...
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Rockburst prediction using artificial intelligence techniques: A review
July 2024
Rockburst is a phenomenon where sudden, catastrophic failure of the rock mass occurs in underground deep regions or areas with high tectonic stress during the excavation process. Rockburst disasters...
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